package com.hmdp.service.impl;

import static com.hmdp.utils.RedisConstants.CACHE_SHOP_TTL;
import static com.hmdp.utils.RedisConstants.LOGIN_CODE_KEY;
import static com.hmdp.utils.RedisConstants.LOGIN_CODE_TTL;
import static com.hmdp.utils.RedisConstants.LOGIN_USER_TTL;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.RandomUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private UserMapper userMapper;

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        // 校验手机号
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误");
        }
        // 生产验证码
        String code = RandomUtil.randomNumbers(6);

        // 保存redis

        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone, code, LOGIN_CODE_TTL, TimeUnit.MINUTES);

        // 发送验证码
        log.debug("发送短信验证码成功，验证码：{}", code);
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        String phone = loginForm.getPhone();

        // 1. 校验手机号
        if (RegexUtils.isPhoneInvalid(loginForm.getPhone())) {
            return Result.fail("手机号格式错误");
        }
        // 校验手机号和验证码 是否一致
        String code = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        if (StrUtil.isEmpty(code)) {
            return Result.fail("验证码失效");
        }
        if (!code.equals(loginForm.getCode())) {
            return Result.fail("验证码错误");
        }
        // 查询用户是否存在
        User user = query().eq("phone", loginForm.getPhone()).one();
        if (ObjectUtil.isEmpty(user)) {
            // 不存在创建用户
            user = createUserWithPhone(loginForm.getPhone());
            // 保存到数据库
            userMapper.insert(user);
        }
        // 7.保存用户信息到 redis中
        // 7.1.随机生成token，作为登录令牌，用户信息
        String token = UUID.randomUUID().toString(true);
        // 7.2 将User对象转为HashMap存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO, new HashMap<>(), CopyOptions.create()
                .setIgnoreNullValue(true)
                .setFieldValueEditor((fieldName, fieldValue) -> fieldValue.toString()));

        // 存储
        String tokenKey = LOGIN_CODE_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey, userMap);
        // 7.4.设置token有效期
        stringRedisTemplate.expire(tokenKey, CACHE_SHOP_TTL, TimeUnit.MINUTES);
        // 7.5.返回token
        return Result.ok(token);

    }

    private User createUserWithPhone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX + RandomUtil.randomString(6));
        //user.setCreateTime(LocalDateTime.now());
        return user;
    }
}
